A lot has been said regarding the new "Exposť in the Dock" feature in Snow Leopard. Just click and hold on a Dock icon, and you'll get an Exposť view of all that apps open windows.

I am not sure if this is common knowledge or not, but if you Control-click (or right-click) on a Dock item, you get the pre-10.6-style pop-up Dock menus. They are the new white-on-black HUD style menus, but with the old functionality.

Extra credit goes to the person who finds out how to set this as the default behavior.

Are you sure you're reporting on the experience of the GM version 10a432?
That was the result for earlier builds of 10.6 but the retail version that I have on my machine is not exhibiting that behavior.

I don't consider this the "old-style" contextual menus. The distinction is between normal Dock behavior, and Dock Exposť. However it is an inconsistency in the UI and I wouldn't be surprised if Apple aligns these behaviors in an upcoming release.